Jack went to sleep at 8:05pm. his sister went to sleep 45 minutes before him. At what time did Jack’s sister got to sleep ? 

To find out what time Jack's sister went to sleep, subtract 45 minutes from the time Jack went to sleep.

Jack went to sleep at 8:05 PM. Let's subtract 45 minutes from that:

- Subtracting 5 minutes from 8:05 PM takes us to 8:00 PM.
- Subtracting an additional 40 minutes from 8:00 PM takes us to 7:20 PM.

Therefore, Jack's sister went to sleep at **7:20 PM**.

Would you like further details or have any other questions?

Here are some related questions you might find interesting:
1. If Jack's sister wakes up 8 hours after she went to sleep, what time does she wake up?
2. How many total minutes did Jack sleep if he wakes up at 6:30 AM?
3. What is the difference in sleep duration between Jack and his sister if they both wake up at 6:30 AM?
4. If Jack's bedtime is delayed by 20 minutes every night, what time will he go to sleep after 3 nights?
5. How many hours and minutes are there between 7:20 PM and 8:05 PM?
6. If Jack and his sister both sleep for 9 hours, what time do they wake up?
7. How much earlier would Jack's sister have to go to sleep to get 10 hours of sleep?
8. What is the total amount of sleep in minutes if Jack's sister goes to bed at 7:20 PM and wakes up at 6:00 AM?

**Tip:** When subtracting time, always break it down into minutes and hours for accurate calculations.

Learn how to calculate bedtime using time calculations. Jack went to sleep at 8:05 PM, and his sister went to sleep 45 minutes before him. Find out at what time Jack's sister went to sleep with a step-by-step explanation. Suitable for students in Grades 4-6.

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